Features Wireless Mini Optical Mouse automatically powers OFF when the USB wireless receiver is stored in the Smart receiver storage compartment, ensuring that you don't leave it behind. With one touch of the release button, you can eject the wireless receiver stored inside the mouse for simple connectivity. Changing batteries has never been so easy. A simple touch of a button releases the battery cover, making it easy to change batteries. Equipped with 800 dpi resolution optical technology, providing more moving accuracy Specifications: Dimensions: 85 x 51 x 30 mm Technology: Radio frequency and optical sensor Optical sensor: 1500 ~2300 signals per second Tracking resolution: 800 CPI Button: 3 Interface: USB System: IBM compatible * PC Window 98 SE or later, available PS/2 port or USB port Battery life: 2 X AAA, depends on mouse usage Transmission: RF 27 MHz, 1 channel, 255 ID Operation: 7 feet Availability: Usually ships the same business day SuperMax Wireless Mini Optical Mouse M-26WCRegular price: $19.00Sale price: $10.00, 10/$90.00 Secure On-Line Ordering Site Tel: (888) 860-4416 Fax: (732) 416-8788 sales@pctekonline.com Business hours are from 10:30am to 7:00pm EST Monday to Friday 3 Kellogg Court Suite 11 Edison NJ 08817 Copyright (C) 1997-2011, PCTekOnline.com All rights reserved. Thank you for shopping at PCTekOnline.com !